Created attachment 40690 [details]
Test kit with sample doucment and export results
"LibreOffice 3.3.0Beta3 - WIN XP DE [OOO330m12 (build 126.96.36.199)]" shows Form Field Label text for Option Buttons in PDF export. I believe it's a bug, not a feature, because text will not be shown in printout.
Currently I do not have the time to check other forms and LibO applications. I also can check current OOo today in the evening.
Was OK with OOo 3.1.1
I've test it and there is no issue in 3.3.2 anymore, mark this as resolved.